• 제목/요약/키워드: EMIC

검색결과 28건 처리시간 0.024초

Proton Temperature Anisotropy vs Parallel Beta in the Solar Wind

  • Yoon, Peter H.
    • 천문학회보
    • /
    • 제36권2호
    • /
    • pp.92.2-92.2
    • /
    • 2011
  • In view of the planned NASA's and ESA's Solar Probe Plus and Solar Orbiter missions, respectively, to probe the inner heliosphere and the Sun's corona, it is timely to investigate outstanding problems associated with the solar wind. Among them is the temperature anisotropy problem. As the solar wind expands into the interplanetary space, the density and magnetic field decreases radially, thus leading to temperature anisotropy ($T_{\parallel}{\gg}T_{\perp}$). However, the measured temperature anisotropy can at times be characterized by $T_{\perp}$ > $T_{\parallel}$, while at other times the measured $T_{\parallel}/T_{\perp}$ is much milder than predicted by adiabatic theory. Physical reasons remain poorly understood. This notwithstanding, it is known from plasma physics that for $T_{\perp}$ > $T_{\parallel}$ electromagnetic ion-cyclotron (EMIC) and mirror instabilities are excited, while for $T_{\parallel}$ > $T_{\perp}$, fire-hose instability is excited. By constructing the threshold conditions for various instabilities, one may construct a closure relation that may be useful for modeling the solar wind. In the present paper we discuss theoretical construction of the anisotropy-beta relation by means of quasi-linear theories of these instabilities. The present work complements previous efforts on the basis of linear theory, hybrid simulations, and empirical fits of observations.

  • PDF

한국과 미국 소비자의 의복행동에 관한 비교 조사 (A Cross-Cultural Research of Clothing Shopping Behavior among Koreans and Americans)

  • 임숙자;양윤;이승희;안춘순
    • 한국의류학회지
    • /
    • 제27권3_4호
    • /
    • pp.289-297
    • /
    • 2003
  • The purpose of this study was to compare the concepts related to formal wear and casual wear, the expression image far formal wear and casual wear, the criteria for clothing selection, the most appropriate clothing for the specific situation, the price range, the kinds of accessories matched with clothing, the time for purchase, the patronage site, and the appropriate colors fur formal wear and casual wear. The total of 396 consumers, 20s' and 40s' female consumers in Korea and America were sampled in both countries. The sampling places were college campus, business district, department stores, and shopping mall in Seoul and Columbus, Ohio. Formal wear and casual wear were selected as survey items. The results showed that the consumers in both countries revealed emic and etic phenomena. Based on the results of this survey, the fundamental information and implications for clothing shopping behaviors in Korea and America can be provided.

소화성궤양환자의 통증표현양상에 관한 연구 (A study on Pain Express Pattern of Peptic Ulcer Patient)

  • 김정선;최영희
    • 대한간호학회지
    • /
    • 제21권2호
    • /
    • pp.230-246
    • /
    • 1991
  • Pain is a subjective and multidemensional concept. Therefore the patient's expression of pain have been referedl to the best believable indicator of pain condition but the support data obtained from the patient considered cultural difference is a deficient condition in determinded on the precise nursing diagnosis. The purpose of this reasearch was to understand multiple pain reponses in cultural difference and sensitivity, to encourage communication between medical teams, and to provide the foundation data of on data of precise nursing assessment for the patient in pain. The research problem was to grasp pain express pattern of Korean peptic ulcer patients. The subjects were 20 peptic ulcer patients in medical unit or OPD of twp university hospitals in Seoul. Data were collected from September 7th to 22nd, 1990 by intensive interviews. Interviews were done by the researcher and all were tape - recorded. The Data analysis was done by Phenomenological method from Van Kaam. Validity assured by confirmation of the internal consistency of the statements and catigory by nursing collegue in educational and clinicions in medical care. From the emic data, 96 descriptive statements were organized in 18 theme cluster. The results of study were summerized as follows. 1. Pain Express Pattern cluster of Peptic Ulcer Patients were “Pain as clogging”, “shallow pain”, “pain as pressing”, “nauseating pain”, “pain as smarting”, “pain as pulling”, “pain as pricking”, “pain as bursting”, “wrenching pain”, “excising pain”, “uncontrollable pain for mind and body”, “awakening pain”, “pain as hollowing” and the other cluster. As above mentioned, Pain Express Pattern of Peptic Ulcer Patient appeared diversely in verbal and they were propered to Korean culture. Therefore they will provide for the foundation data of precise nursing assessment.

  • PDF

노인의 지속적 자원봉사활동 경험 : 현상학적 연구 (Continuous Volunteering Experience in Elderly People : A Phenomenological Research)

  • 유정숙;김가득
    • 한국사회복지학
    • /
    • 제62권3호
    • /
    • pp.247-270
    • /
    • 2010
  • 본 연구는 노인의 지속적 자원봉사활동 경험이 그들의 삶에 부여하는 의미와 본질은 어떤 것인가를 이해하기 위해 Giorgi의 현상학적 연구방법을 사용하여 자료를 분석하였다. 짧게는 6년, 길게는 23년 이상 지속적으로 봉사활동에 참여하고 있는 전라북도 거주 노인 5명을 대상으로 심층면접을 실시하였다. 분석 결과, '마음에서 우러나옴', '노후에 새로운 삶을 발견함', '아낌없이 주는 즐거움', '삶의 중심으로 들어온 봉사활동', '쉼 없는 봉사활동'이라는 5개의 구성요소를 도출하고, 본질적 주제는 '다시 찾은 활기 찬 삶의 기쁨'으로 나타났다. 본 연구에서 밝혀진 노인의 지속적 자원봉사활동 경험의 본질은 '성공적 노후생활의 구성요소'와 대체로 일치한다. 따라서 자원봉사활동이 '개인적 차원의 선행'이라는 의미에서 '성공적 노후생활'의 실현을 위한 사회적 차원의 조건이라는 의미로 해석되어야 하는 인식론적 전환이 이루어져야 할 것이고, 이를 구현하기 위해 국가 및 공공차원의 지원 대책이 적극 마련되어야 할 것이다.

  • PDF

대학 교수의 생애사 연구 (A Life History Approach on a Professor Academic Activities)

  • 차현주
    • 한국융합학회논문지
    • /
    • 제7권5호
    • /
    • pp.227-235
    • /
    • 2016
  • 본 연구는 대학교수의 생애사를 고찰하여 대학교수에 대한 삶의 의미를 살펴봄으로써 유아기나 아동기 진로교육을 담당하는 부모나 교사들에게 진로정보를 제공하는데 목적이 있다. 이를 위해 25년간의 교수경력을 가진 K교수를 대상으로 교수 자신의 목소리와 용어로 묘사하는 내부자적인 관점으로 생애사 연구방법으로 수행하였으며, K교수의 심층면담, 저서, 이메일, 전화면담을 통해 자료를 수집하였다. 수집된 자료는 전사하여 컴퓨터로 폴더화하고 영역분석과 분류분석 단계를 거쳐 분석되었다. 분석 결과, K교수가 교수사회에 진입하게 된 동기와 계기에서는 피나는 노력과 가족의 지지, 수어지교의 만남이 있었던 것으로 나타났다. 또한 대학 진입이후에는 연구, 교육뿐만 아니라 보직교수로서 대학에서 핵심적 역할을 담당하였다. 정년 이후의 삶은 전문가와 실천가로서 사회공헌에 기여하고 있었다. 이와 같은 K교수의' 경험에서 교수역량에는 '끊임없는 노력과 부단한 자기혁신', '강인한 신념과 뚜렷한 소명의식', '따뜻한 인간애와 실천적 삶', '유연한 사고방식과 교육적 열정' 라는 의미가 도출되었다.

Scientific Missions and Technologies of the ISSS on board the NEXTSat-1

  • Choi, Cheong Rim;Sohn, Jongdae;Lee, Jun-Chan;Seo, Yong Myung;Kang, Suk-Bin;Ham, Jongwook;Min, Kyoung-Wook;Seon, Jongho;Yi, Yu;Chae, Jang-Soo;Shin, Goo-Hwan
    • Journal of Astronomy and Space Sciences
    • /
    • 제31권1호
    • /
    • pp.73-81
    • /
    • 2014
  • A package of space science instruments, dubbed the Instruments for the Study of Space Storms (ISSS), is proposed for the Next Generation Small Satellite-1 (NEXTSat-1), which is scheduled for launch in May 2016. This paper describes the instrument designs and science missions of the ISSS. The ISSS configuration in NEXTSat-1 is as follows: the space radiation monitoring instruments consist of medium energy particle detector (MEPD) and high energy particle detector (HEPD); the space plasma instruments consist of a Langmuir probe (LP), a retarding potential analyzer (RPA), and an ion drift meter (IDM). The space radiation monitoring instruments (MEPD and HEPD) measure electrons and protons in parallel and perpendicular directions to the geomagnetic field in the sub-auroral region, and they have a minimum time resolution of 50 msec for locating the region of the particle interactions with whistler mode waves and electromagnetic ion cyclotron (EMIC) waves. The MEPD measures electrons and protons with energies of tens of keV to ~400 keV, and the HEPD measures electrons with energies of ~100 keV to > ~1 MeV and protons with energies of ~10 MeV. The space plasma instruments (LP, RPA, and IDM) observe irregularities in the low altitude ionosphere, and the results will be compared with the scintillations of the GPS signals. In particular, the LP is designed to have a sampling rate of 50 Hz in order to detect these small-scale irregularities.

다중이용시설에서의 AED에 관한 지식 및 운영실태에 관한 연구 - 광주광역시 중심으로 - (Knowledge and Current Status about AED in the Public Facilities - Focused on the Gwangju City -)

  • 박시구;박창현;채민정
    • 한국응급구조학회지
    • /
    • 제14권3호
    • /
    • pp.13-28
    • /
    • 2010
  • Purpose: In this study, we investigated the better application of the law which is about the AED installation and more effective ways of emergency medical care system, to understand the law and to research the current condition of public facilities which belong to local governments, and to seize the aspect of safety guards who currently work in order to provide the installation of AED in the public facilities and to provide more efficient emergency medical service with the effectuation of the immunity law of the good intention of first-aid treatment. Methods: In Gwang-ju, 234 public facilities have been identified by 31 December, 2008. With the exception of the duplication, we researched 158 facilities and received the answers from 95 of them. Results: In the research, 53% of them have had internal emergency first-aid education, and 55% of them didn't have this education and a CPR education manual, and 30% of the facilities even didn't know how to connect with the manager of the company for the first-aid department. On the other hand, most of them were highly interested in CPR and AED education on the ratio of 91% and 93%. 88% of them have been trained about first-aid, 51% of them haven't been retrained, 17% have never been trained. so, the reality of emergency system at public facilities is serious. 78% of them knew they are working at public facilities, though 49% of them didn't know about AED installation. 57% of them didn't know the fact there is the immunity law related with good intentions for first-aid treatment. 63% of the facilities have security guards, and 30% of them didn't answer the questions. Also, many of them agreed to the opinion that all employees should have first-aid training. At representative survey report of participator of public-facility, emergency treatment is 61%, 16% of patients calling. Accordingly they importantly think better doing an on-site first-aid than evacuating the patient. And the rates show that 57% of them answerers tend to call Fire-Office(119) for evacuating the patients, and 28% of them EMIC(1339) for the first-aid. Conclusions: In this study, we are suggest to improve the details of the efficient operations and management after the grasp of the uninstallation, indifference, and unreliable conditions of AED. 1) Need a publicity of AED install cognition which is an emergency medical instrument at public facilities. 2) Arrangement of safety agents at facilities and concerns about them for good management from the parties concerned. 3) Need a designation of legal details according to the decision of the AED installation and the standard of the AED installation. 4) Training about first-aid of safety guards and the persons concerned in the facilities should be practiced participation with the positive and through this, first-aid treatment could be done by anyone who knows the immunity law related to medical emergency. 5) The brochures for the potential users and the results form practicing the instructions need to be improved in many ways through recording the emergency cases that have happened.

  • PDF

Small scale magNetospheric and Ionospheric Plasma Experiments; SNIPE mission

  • Hwang, Junga;Lee, Jaejin;Shon, Jongdae;Park, Jaeheung;Kwak, Young-Sil;Nam, Uk-Won;Park, Won-Kee
    • 천문학회보
    • /
    • 제42권1호
    • /
    • pp.40.3-41
    • /
    • 2017
  • Korea Astronomy and Space Science Institute The observation of particles and waves using a single satellite inherently suffers from space-time ambiguity. Recently, such ambiguity has often been resolved by multi-satellite observations; however, the inter-satellite distances were generally larger than 100 km. Hence, the ambiguity could be resolved only for large-scale (> 100 km) structures while numerous microscale phenomena have been observed at low altitude satellite orbits. In order to resolve those spatial and temporal variations of the microscale plasma structures on the topside ionosphere, SNIPE mission consisted of four (TBD) nanosatellites (~10 kg) will be launched into a polar orbit at an altitude of 700 km (TBD). Two pairs of satellites will be deployed on orbit and the distances between each satellite will be from 10 to 100 km controlled by a formation flying algorithm. The SNIPE mission is equipped with scientific payloads which can measure the following geophysical parameters: density/temperature of cold ionospheric electrons, energetic (~100 keV) electron flux, and magnetic field vectors. All the payloads will have high temporal resolution (~ 16 Hz (TBD)). This mission is planned to launch in 2020. The SNIPE mission aims to elucidate microscale (100 m-10 km) structures in the topside ionosphere (below altitude of 1,000 km), especially the fine-scale morphology of high-energy electron precipitation, cold plasma density/temperature, field-aligned currents, and electromagnetic waves. Hence, the mission will observe microscale structures of the following phenomena in geospace: high-latitude irregularities, such as polar-cap patches; field-aligned currents in the auroral oval; electro-magnetic ion cyclotron (EMIC) waves; hundreds keV electrons' precipitations, such as electron microbursts; subauroral plasma density troughs; and low-latitude plasma irregularities, such as ionospheric blobs and bubbles. We have developed a 6U nanosatellite bus system as the basic platform for the SNIPE mission. Three basic plasma instruments shall be installed on all of each spacecraft, Particle Detector (PD), Langmuir Probe (LP), and Scientific MAGnetometer (SMAG). In addition we now discuss with NASA and JAXA to collaborate with the other payload opportunities into SNIPE mission.

  • PDF